Lighting lamp

ABSTRACT

The present disclosure provides a lighting lamp, which includes a lamp cap and a connecting rod assembly, the connecting rod assembly includes a first connecting rod, a second connecting rod and a damper; a first end of the second connecting rod is rotatably connected with a first end of the first connecting rod; a first end of the damper is connected with the first connecting rod, a second end of the damper is connected with the second connecting rod, and the lamp cap is connected with the first connecting rod.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is based upon and claims the priority of PCT patentapplication No. PCT/CN2020/135298 filed on Dec. 10, 2020, which claimspriority to Chinese Patent Application No. CN201922227762.6 filed onDec. 10, 2019, the entire contents of both of which are herebyincorporated by reference herein for all purposes.

TECHNICAL FIELD

The present disclosure relates to the technical field of lightingequipment, and in particular, to a lighting lamp.

BACKGROUND

Lamps refer to appliances that can transmit light and can distribute andchange the light distribution of the light source. The lamps include allthe components needed to fix and protect the light source except thelight source, as well as wiring accessories necessary for connectionwith the power source. The lamps mainly include table lamps, wall lamps,etc.

SUMMARY

examples of the present disclosure provides a lighting lamp, including alamp cap and a connecting rod assembly. The connecting rod assemblyincludes a first connecting rod, a second connecting rod and a damper; afirst end of the second connecting rod is rotatably connected with afirst end of the first connecting rod; the damper includes a fixed endand a movable end, the movable end is slidably connected with the fixedend, and damping force is provided between the movable end and the fixedend; the fixed end is connected with one of the first connecting rod andthe second connecting rod, and the movable end is connected with theother one of the first connecting rod and the second connecting rod; thelamp cap is connected with the first connecting rod.

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings described here are used to provide a further understandingof the present disclosure and constitute a part of the presentdisclosure. The examples and their descriptions are used to explain thepresent disclosure and do not constitute an improper limitation of thepresent disclosure. In the drawings:

FIG. 1 is a front view of a connecting rod assembly disclosed inexamples of the present disclosure;

FIG. 2 is a rear view of the connecting rod assembly disclosed in theexamples of the present disclosure;

FIG. 3 is a schematic diagram of a first connecting rod disclosed in theexamples of the present disclosure;

FIG. 4 is a partial enlarged view of a first end of the first connectingrod disclosed in the examples of the present disclosure;

FIG. 5 is a schematic diagram of a second connecting rod disclosed inthe examples of the present disclosure;

FIG. 6 is a partial enlarged view of a first end of the secondconnecting rod disclosed in the examples of the present disclosure;

FIG. 7 is a partial enlarged view of a second end of the secondconnecting rod disclosed in the examples of the present disclosure;

FIG. 8 is a schematic diagram of a third connecting rod disclosed in theexamples of the present disclosure;

FIG. 9 is a schematic diagram of a damper disclosed in the examples ofthe present disclosure;

FIG. 10 is a schematic diagram of a first lighting lamp disclosed in theexamples of the present disclosure;

FIG. 11 is a rear view of the first lighting lamp disclosed in theexamples of the present disclosure;

FIG. 12 is a schematic diagram of a lamp cap disclosed in the examplesof the present disclosure;

FIG. 13 is a schematic diagram of a second lighting lamp disclosed inthe examples of the present disclosure;

FIG. 14 is a schematic diagram of a third lighting lamp disclosed in theexamples of the present disclosure;

DETAILED DESCRIPTION

Examples of the present disclosure will be described below incombination with the accompanying drawings of the present disclosure.Apparently, the described examples are merely a part rather than all theexamples of the present disclosure. All other examples that are derivedfrom the examples of the present disclosure by an ordinary skilled inthe art without creative efforts shall fall within the protection scopeof the present disclosure. The reference numerals in the accompanyingdrawings are merely used to distinguish different steps in technicalsolutions from each other, rather than delimiting execution orders ofthe steps. The specific execution order may be referred to thedescription in the present disclosure.

Terms used in the present disclosure are merely for describing specificexamples and are not intended to limit the present disclosure. Thesingular forms “one”, “the”, and “this” used in the present disclosureand the appended claims are also intended to include a multiple form,unless other meanings are clearly represented in the context. It shouldalso be understood that the term “and/or” used in the present disclosurerefers to any or all of possible combinations including one or moreassociated listed items.

Reference throughout this specification to “one embodiment,” “anembodiment,” “an example,” “some embodiments,” “some examples,” orsimilar language means that a particular feature, structure, orcharacteristic described is included in at least one embodiment orexample. Features, structures, elements, or characteristics described inconnection with one or some embodiments are also applicable to otherembodiments, unless expressly specified otherwise.

It should be understood that although terms “first”, “second”, “third”,and the like are used in the present disclosure to describe variousinformation, the information is not limited to the terms. These termsare merely used to differentiate information of a same type. Forexample, without departing from the scope of the present disclosure,first information is also referred to as second information, andsimilarly the second information is also referred to as the firstinformation. Depending on the context, for example, the term “if” usedherein may be explained as “when” or “while”, or “in response to . . . ,it is determined that”.

Table lamps are generally used for lighting in office or study places,such as reading, writing, design, review, etc. For people who do desktopwork, ensuring a good visual environment in the work area is of greatbenefit to improving the quality of study and office, improving workefficiency and protecting physical health. The brightness and uniformityof the light should match the brightness and darkness of the surroundingenvironment, and the brightness of the light and the brightness of theenvironment should not be too different. The relationship betweenbrightness and uniformity of the light may be balanced by rotationadjusting the height of the light source and the direction of the lightsource, so as to avoid eye fatigue and create a comfortable and healthylight environment.

Current lamps mainly use latch rotation shafts, disc-shaped rotationshafts or gooseneck hoses as rotating structural members. These rotatingstructural members generally have disadvantages such as unstableperformance, short life and poor hand feeling.

Description of reference numerals: 10—connecting rod assembly; 100—firstconnecting rod; 110—first arc-shaped groove; 120—first installationgroove; 200—second connecting rod; 210—first block; 220—secondarc-shaped groove; 230—second installation groove; 300—damper; 310—fixedend; 320—movable end; 400—third connecting rod; 410—second block;500—wire hole; 20—lamp cap; 21—connecting portion; 22—light source;30—connecting base; 40—power source; 50—wire.

Refer to FIGS. 1, 2 and 10, the example of the present disclosurediscloses a lighting lamp, which includes a lamp cap 20 and a connectingrod assembly 10, and the connecting rod assembly 10 includes a firstconnecting rod 100, a second connecting rod 200 and a damper 300.

A first end of the second connecting rod 200 is rotatably connected witha first end of the first connecting rod 100, and a damper 300 isinstalled between the first connecting rod 100 and the second connectingrod 200. A first end of the damper 300 is connected with the firstconnecting rod 100, a second end of the damper 300 is connected with thesecond connecting rod 200, and the damper 300 may be connected with thefirst connecting rod 100 and the second connecting rod 200 by means ofscrews or pins.

Referring to FIG. 9, in the present example, the first end of the damper300 may be a fixed end 310, that is, the first end is fixedly connectedwith a main body, and the second end of the damper 300 may be set as amovable end 320, that is, the second end of the damper 300 can betelescopic relative to the main body.

The lamp cap 20 may be connected with any one of the first connectingrod 100 and the second connecting rod 200.

In the present example, the damper 300 may be a hydraulic damper 300 ora spring-damper 300.

The connecting rod assembly 10 of the lighting lamp disclosed in thepresent disclosure is provided with the damper 300 between the firstconnecting rod 100 and the second connecting rod 200. The damper 300 isa device that provides resistance to movement to reduce movement energy.The damper 300 is a device that can quickly stop the movable part of theinstrument at a stable deflection position. The expansion andcontraction life of the damper is up to 30,000 times, and itsperformance is stable, the movement is smooth and continuous, the strokeis adjustable, and the hand feels fine and smooth. Thus, the connectingrod assembly 10 provided by the present disclosure has the advantages oflong service life, stable and smooth adjustment under the premise ofensuring simple structure and novel appearance. Especially in thelarge-angle adjustment, stable and smooth performance of the connectingrod assembly can still be maintained, which enables that the overallvibration of the lighting lamp is small and the operation of thelighting lamp is convenient during adjusting the position of the lampcap 20.

In some implementations of the present example, after the damper 300 isinstalled between the first connecting rod 100 and the second connectingrod 200, in the case where the damper 300 reaches the maximum stroke,the first connecting rod 100 and the second connecting rod 200 cannot berotated to be parallel to each other, so that the included angle betweenthe first connecting rod 100 and the second connecting rod 200 canalways be kept less than 180 degrees during the relative rotationbetween the first connecting rod 100 and the second connecting rod 200,so as to facilitate the adjustment, and the rotation stroke of the firstconnecting rod 100 and the second connecting rod 200 is restricted.

Referring to FIGS. 3 to 6, a first arc-shaped groove 110 may further beprovided on one of the first connecting rod 100 and the secondconnecting rod 200, and the first arc-shaped groove 110 is arrangedaround a rotation axis of the first connecting rod 100. In addition,distances between respective positions of the first arc-shaped groove110 and the rotation axis of the first connecting rod 100 are equal, thefirst arc-shaped groove 110 penetrates the first connecting rod 100along the direction of the rotation axis of the first connecting rod100. The screw or pin on the movable end 320 of the damper 300 may beinserted into the first arc-shaped groove 110, and the screw or pin onthe movable end 320 can slide along the first arc-shaped groove 110. Thelength of the first arc-shaped groove 110 and the center anglecorresponding to the first arc-shaped groove 110 can control the maximumangle of rotation between the first connecting rod 100 and the secondconnecting rod 200, and have the function of limiting the relativeposition of the first connecting rod 100 and the second connecting rod200, and the angle between the first connecting rod 100 and the secondconnecting rod 200.

Referring to FIGS. 5 and 6, further, a first block 210 may be providedon the other one of the first connecting rod 100 and the secondconnecting rod 200. In the present example, the first block 210 may beprovided on the second connecting rod 200, and the first arc-shapedgroove 110 is provided in the first connecting rod 100. The movable end320 of the damper 300 may be connected with the first block 210, and thefixed end 310 of the damper 300 may be connected with the other one ofthe first link 100 and the second link 200 that is not provided with thefirst block 210. The arrangement of the first block 210 allows thedamper 300 to be connected with the side wall of the first connectingrod 100 or the second connecting rod 200, and during the relativerotation of the first connecting rod 100 and the second connecting rod200 to reduce the included angle, such an arrangement can prevent thedamper 300 from being stuck between the first connecting rod 100 and thesecond connecting rod 200, thereby allowing the first connecting rod 100and the second connecting rod 200 to rotate to a position with a smallerincluded angle.

The first block 210 is clamped in the first arc-shaped groove 110, andan end of the first block 210 away from the second connecting rod 200extends to the other side of the first connecting rod 100, the damper300 may be installed on a side of the first connecting rod 100 away fromthe second connecting rod 200, at this time, the movable end 320 of thedamper 300 can be connected with the end of the first block 210 awayfrom the second connecting rod 200. The first arc-shaped groove 110 maybe arranged around the rotation axis of the first connecting rod 100,the first arc-shaped groove 110 has an arc shape, so that the firstblock 210 can slide along the first arc-shaped groove 110 in the casewhere the second connecting rod 200 rotates relative to the firstconnecting rod 100. The arrangement of the first arc-shaped groove 110can make the damper 300 and the first connecting rod 100 be parallel,and at the same time, the damper 300 can expand and contract moresmoothly, thereby facilitating the positioning of the first connectingrod 100 and the second connecting rod 200.

In addition, a first installation groove 120 may be provided on thefirst connecting rod 100. The first installation groove 120 is locatedon the side of the first connecting rod 100 away from the secondconnecting rod 200, and the first installation groove 120 is incommunication with the first arc-shaped groove 110. The damper 300 maybe installed in the first installation groove 120. After the damper 300is installed in the first installation groove 120, it can be avoidedthat the damper 300 protrudes on the surface of the first connecting rod100, thereby making the connecting rod assembly 10 more beautiful, andfalse touches to the damper 300 can also be avoided.

A length of the first installation groove 120 may be the same as alength of the damper 300 in the case where the damper 300 is extended tothe longest. The first arc-shaped groove 110 with an arc shaped iscompletely located within the first installation groove 120. When themovable end 320 of the damper 300 slides along the first arc-shapedgroove 110 with the first block 210, the damper 300 swings slightly, soa width of the first installation groove 120 may be slightly larger thana width of the damper 300, to accommodate the swing of the damper 300.

The first installation groove 120 may be arranged obliquely to the firstconnecting rod 100, while ensuring that the first installation groove120 can fully accommodate the first arc-shaped groove 110, two ends ofthe first installation groove 120 are respectively extended to be closeto two sides of the first connecting rod 100 in the length direction.

The above mentioned is only the solution in which the first block 210 isarranged on the second connecting rod 200, and the first arc-shapedgroove 110 is arranged on the first connecting rod 100. In some otherexamples, it is possible to set the first block 210 on the firstconnecting rod 100, and set the first arc-shaped groove 110 in thesecond connecting rod 200, correspondingly, the first installationgroove 120 needs to be also provided on the second connecting rod 200.

In some implementations of the present example, the connecting rodassembly 10 may include a plurality of dampers 300, and the connectingrod assembly 10 may further include a third connecting rod 400. A firstend of the third connecting rod 400 may be rotationally connected with asecond end of the second connecting rod 200, and a rotation axis of thethird connecting rod 400 may be parallel to the rotation axis of thefirst connecting rod 100, and the damper 300 may be provided between thethird connecting rod 400 and the second connecting rod 200.

Referring to FIGS. 5, 7 and 8, in the same way as the connection modebetween the second connecting rod 200 and the first connecting rod 100,the third connecting rod 400 and the second connecting rod 200 may beconnected through the cooperation of the second block 410 and the secondarc-shaped groove 220. In the present example, the second block 410 maybe located on the third connecting rod 400, and the second arc-shapedgroove 220 may be located on the second connecting rod 200. Similarly,the second arc-shaped groove 220 may penetrate the second connecting rod200 along the direction of the rotation axis of the second connectingrod 200.

The second block 410 is clamped in the second arc-shaped groove 220, andan end of the second block 410 away from the third connecting rod 400extends to the other side of the second connecting rod 200, the damper300 may be installed on a side of the second connecting rod 200 awayfrom the third connecting rod 400, at this time, the movable end 320 ofthe damper 300 can be connected with the end of the second block 410away from the third connecting rod 400. The second arc-shaped groove 220may be arranged around the rotation axis of the second connecting rod200, the second arc-shaped groove 220 has an arc shape, so that thesecond block 410 can slide along the second arc-shaped groove 220 whenthe third connecting rod 400 rotates relative to the second connectingrod 200. The arrangement of the second arc-shaped groove 220 can makethe damper 300 and the second connecting rod 200 be parallel, at thesame time, the damper 300 can expand and contract more smoothly, therebyfacilitating the positioning of the second connecting rod 200 and thethird connecting rod 400.

In addition, a second installation groove 230 may be provided in thesecond connecting rod 200. The second installation groove 230 is locatedon a side of the second connecting rod 200 away from the thirdconnecting rod 400, and the second installation groove 230 is incommunication with the second arc-shaped groove 220. The damper 300 maybe installed in the second installation groove 230. After the damper 300is installed in the second installation groove 230, it can be avoidedthat the damper 300 protrudes on the surface of the second connectingrod 200, thereby making the connecting rod assembly 10 more beautiful,and false touches to the damper 300 can also be avoided.

A length of the second installation groove 230 may be the same as alength of the damper 300 in the case where the damper 300 is extended tothe longest. The second arc-shaped groove with an arc shaped iscompletely located in the second installation groove 230. During themovable end 320 of the damper 300 slides along the second arc-shapedgroove 220 with the second block 410, the damper 300 swings slightly, soa width of the second installation groove 230 may be slightly largerthan a width of the damper 300, to accommodate the swing of the damper300.

The second installation groove 230 may be arranged obliquely to thesecond connecting rod 200, while ensuring that the second installationgroove 230 can fully accommodate the second arc-shaped groove 220, twoends of the second installation groove 230 are respectively extended tobe close to two sides of the second connecting rod 200 in the lengthdirection.

The above mentioned is only the solution in which the second block 410is arranged on the third connecting rod 400, and the second arc-shapedgroove 220 is arranged on the second connecting rod 200. In some otherexamples, it is possible to dispose the second block 410 on the secondconnecting rod 200, and dispose the second arc-shaped groove 220 on thethird connecting rod 400, correspondingly, the second installationgroove 230 needs to be also provided on the third connecting rod 400.

After the damper 300 is installed between the second connecting rod 200and the third connecting rod 400, when the damper 300 reaches themaximum stroke, the second connecting rod 200 and the third connectingrod 400 cannot be rotated to be parallel to each other, so that theincluded angle between the second connecting rod 200 and the thirdconnecting rod 400 can always be kept less than 180 degrees during therelative rotation between the second connecting rod 200 and the thirdconnecting rod 400. It is possible to make the angle between the secondconnecting rod 200 and the third connecting rod 400, and the anglebetween the second connecting rod 200 and the first connecting rod 100be located on both sides of the second connecting rod 200, respectively,thereby the connecting rod assembly 10 occupies a small space during theadjustment process.

In some implementations of the present example, the included anglebetween the first connecting rod 100 and the second connecting rod 200may be less than 90 degrees, and the included angle between the secondconnecting rod 200 and the third connecting rod 400 may also be lessthan 90 degrees. The rotation angle between the first connecting rod 100and the second connecting rod 200 may be adjusted and controlledaccording to the stroke of the damper 300, the length of the firstarc-shaped groove 110, and the center angle corresponding to the firstarc-shaped groove 110. The rotation angle between the second connectingrod 200 and the third connecting rod 400 may be adjusted and controlledaccording to the stroke of the damper 300, the length of the secondarc-shaped groove 220, and the center angle corresponding to the secondarc-shaped groove 220.

Specifically, the rotation angle between the first connecting rod 100and the second connecting rod 200 may be controlled within 65 degrees,and the rotation angle between the second connecting rod 200 and thethird connecting rod 400 may be controlled within 45 degrees.

In the present example, the cross-sectional shapes of the firstconnecting rod 100, the second connecting rod 200 and the thirdconnecting rod 400 may be the same. Preferably, the cross-sections ofthe first connecting rod 100, the second connecting rod 200 and thethird connecting rod 400 may all be square, round or oval.

In some implementations of this example, the connecting rod assembly 10includes at least two second connecting rods 200, two adjacent secondconnecting rods 200 are rotatably connected, and the damper 300 isconnected between the two adjacent second connecting rods 200.

Referring to FIGS. 5 to 7, one end of the second connecting rod 200 maybe provided with a first block 210, and the other end of the secondconnecting rod 200 may be provided with a second arc-shaped groove 220.The first block 210 on one second connecting rod 200 in the two adjacentones is clamped into the other second arc-shaped groove 220 in the twoadjacent ones, and then the first block or the second arc-shaped groove220 at the end of the second connecting rods 200 are respectivelyconnected with the first connecting rod 100 and the third connecting rod400.

In the case where two second connecting rods 200 are provided, there isan included angle between the two second connecting rods 200, theincluded angle between the second connecting rod 200 and the firstconnecting rod 100 and the included angle between the second connectingrod 200 and the third connecting rod 400 are both located on the otherside of the included angle between the two second connecting rods 200.

In the case that three or more second connecting rods 200 are providedand the number of the second connecting rods 200 is an odd number, theplurality of second connecting rods 200 extend in “Z” shape. Theincluded angle formed between the second connecting rod 200 and thefirst connecting rod 100 and the included angle formed between thesecond connecting rod 200 and the third connecting rod 400 should faceopposite directions, so that the first connecting rod 100, the thirdconnecting rod 400 and the odd number of second connecting rods 200together form “Z” shape. In the case where the number of the secondconnecting rods 200 is an even number, the plurality of secondconnecting rods 200 extend in “Z” shape. The included angle formedbetween the second connecting rod 200 and the first connecting rod 100and the included angle formed between the second connecting rod 200 andthe third connecting rod 400 should face the same direction, so that thefirst connecting rod 100, the third connecting rod 400 and the evennumber of second connecting rods 200 together form “Z” shape.

Referring to FIG. 11, the connecting rod assembly 10 may further beprovided with a wire hole 500 for the wire 50 to pass through. The wirehole 500 sequentially passes through the third connecting rod 400, thesecond connecting rod 200 and the first connecting rod 100, and the wire50 is located in the wire hole 500, one end of the wire 50 iselectrically connected with the lamp cap 20, and the other end of thewire 50 is electrically connected with a power source 40.

Referring to FIG. 12, in some implementations of the present example,the lamp cap 20 includes a connecting portion 21 and a light source 22,the connecting portion 21 is rotatably connected with the second end ofthe first connecting rod 100. A rotation axis of the connecting portion21 is parallel to the rotation axis of the first connecting rod 100, andthe light source 22 is mounted on the connecting portion 21, the lightsource 22 may be located at an end of the connecting portion 21 awayfrom the first connecting rod 100.

In which, the rotation angle between the connecting part 21 and thefirst connecting rod 100 may be controlled within 135 degrees, theconnecting part 21 and the first connecting rod 100 may be fixed bybolts and nuts, and the nuts may be installed in the connecting portion21, the bolt passes through the second end of the first connecting rod100 and then is screwed to the nut. In the case where the angle betweenthe connecting portion 21 and the first connecting rod 100 needs to beadjusted, loosen the bolt, and tighten the bolt to fixed connect theconnecting portion 21 and the first connecting rod 100 after theadjustment is completed.

In some implementations of the present example, the lighting lamp mayfurther include a connecting base 30. In the case where the connectingrod assembly 10 is not provided with the third connecting rod 400, theconnecting base 30 may be rotatably connected with the second end of thesecond connecting rod 200, a rotation axis of the connecting base 30 iscollinear with the axis of the second connecting rod 200. In the casewhere the connecting rod assembly 10 is provided with the thirdconnecting rod 400, the connecting base 30 may be rotationally connectedwith the third connecting rod 400, and the rotation axis of theconnecting base 30 is collinear with the axis of the third connectingrod 400 to facilitate the adjustment of the position of the lamp cap 20.

In which, referring to FIGS. 13 and 14, the connecting base 30 may be asa chassis or a table clamp to conveniently install or apply the lightinglamp to different positions and scenes.

The lighting lamp described in the present example may be a desk lamp ora wall lamp or other lamps.

The technical solution adopted by the present disclosure can achieve thefollowing beneficial effects:

The connecting rod assembly of the lighting lamp disclosed in thepresent invention is provided with the damper between the firstconnecting rod and the second connecting rod. The damper is a devicethat provides resistance to movement to reduce movement energy. Thedamper is a device that can quickly stop the movable part of theinstrument at a stable deflection position, the expansion andcontraction life of the damper is up to 30,000 times, and itsperformance is stable, the movement is smooth and continuous, the strokeis adjustable, and the hand feels fine and smooth. Thus, the connectingrod assembly provided by the present invention has the advantages oflong service life, stable and smooth adjustment under the premise ofensuring simple structure and novel appearance. Especially in thelarge-angle adjustment, stable and smooth performance of the connectingrod assembly can still be maintained, which enables that the overallvibration of the lighting lamp is small and the operation of thelighting lamp is convenient during adjusting the position of the lampcap. At the same time, the damper is simple in structure and low in unitprice. In the case where the damper is used in lamps, it can shorten theinstallation time to reduce the cost, and improve the texture andaesthetic.

The above-mentioned examples of the present disclosure focus on thedifferences between the examples, and as long as the differentoptimization features between the examples are not contradictory, theycan be combined to form a more optimal example. Considering the succinctwriting, the details will not be repeated herein.

The above descriptions are only the examples of the present disclosure,and are not used to limit the present disclosure. For those skilled inthe art, the present disclosure can have various modifications andchanges. Any modification, equivalent replacement, improvement, etc.made within the spirit and principle of the present disclosure will beincluded in the scope of the claims of the present disclosure.

What is claimed is:
 1. A lighting lamp, comprising: a lamp cap; and a connecting rod assembly, wherein the connecting rod assembly comprises a first connecting rod, a second connecting rod and a damper; a first end of the second connecting rod is rotatably connected with a first end of the first connecting rod; the damper comprises a fixed end and a movable end, the movable end is slidably connected with the fixed end, and damping force is provided between the movable end and the fixed end; the fixed end is connected with one of the first connecting rod and the second connecting rod, and the movable end is connected with the other one of the first connecting rod and the second connecting rod; the lamp cap is connected with the first connecting rod.
 2. The lighting lamp according to claim 1, wherein one of the first connecting rod and the second connecting rod is provided with a first arc-shaped groove, and the first arc-shaped groove is arranged around a rotation axis of the first connecting rod, and the movable end is capable of sliding along the first arc-shaped groove.
 3. The lighting lamp according to claim 2, wherein the other one of the first connecting rod and the second connecting rod is provided with a first block, the first block is clamped to the first arc-shaped groove, and the first block is capable of sliding along the first arc-shaped groove, the movable end is connected with the first block, and the fixed end is connected with the other one of the first link and the second link that is not provided with the first block.
 4. The lighting lamp according to claim 3, wherein the first arc-shaped groove is disposed in the first connecting rod, the first connecting rod is provided with a first installation groove communicating with the first arc-shaped groove, and the damper is located in the first installation groove.
 5. The lighting lamp according to claim 4, wherein a length of the first installation groove is equal to a length of the damper upon extending to the longest.
 6. The lighting lamp according to claim 2, wherein the connecting rod assembly further comprises a third connecting rod, a first end of the third connecting rod is rotatably connected with a second end of the second connecting rod, the connecting rod assembly comprises at least two dampers, and the damper is connected between the third connecting rod and the second connecting rod.
 7. The lighting lamp according to claim 6, wherein one of the second connecting rod and the third connecting rod is provided with a second arc-shaped groove, and the second arc-shaped groove is arranged around a rotation axis of the second connecting rod; the other one of the second connecting rod and the third connecting rod is provided with a second block, the second block is clamped to the second arc-shaped groove, and the second block is capable of sliding along the second arc-shaped groove, the movable end is connected with the second block, and the fixed end is connected with the other one of the second link and the third link that is not provided with the second block.
 8. The lighting lamp according to claim 7, wherein a central angle corresponding to the first arc-shaped groove is less than 90 degrees, a central angle corresponding to the second arc-shaped groove is less than 90 degrees, and the first connecting rod and the third connecting rod are respectively located on opposite sides of the second connecting rod.
 9. The lighting lamp according to claim 6, wherein the connecting rod assembly comprises at least two second connecting rods, adjacent ones of the at least two second connecting rods are rotatably connected, and the damper is connected between the adjacent ones of the at least two second connecting rods.
 10. The lighting lamp according to claim 6, wherein the connecting rod assembly is provided with a wire hole, the wire hole sequentially passes through the third connecting rod, the second connecting rod and the first connecting rod.
 11. The lighting lamp according to claim 1, further comprising a connecting base, the connecting base is rotatably connected with a second end of the second connecting rod, and a rotation axis of the connecting base is collinear with an axis of the second connecting rod.
 12. The lighting lamp according to claim 1, wherein the lamp cap comprises: a connecting portion, which is rotatably connected with a second end of the first connecting rod, and a rotation axis of the connecting portion is parallel to a rotation axis of the first connecting rod; and a light source, which is installed on the connecting portion. 